1 Internet Systems Consortium DHCP Distribution
9 ISC DHCP 4.2.x includes features that were not included in DHCP 4.1.x.
12 There are a number of DHCPv6 limitations and features missing in this
13 release, which will be addressed in the future:
15 - Only Solaris, Linux, FreeBSD, NetBSD, and OpenBSD are supported.
17 - DHCPv6 includes human-readable text in status code messages, in
18 English. A method to reconfigure or support other languages would
21 - The "host-identifier" option is limited to a simple token.
23 - The client and server can only operate DHCPv4 or DHCPv6 at a time,
24 not both. To use both protocols simultaneously, two instances of the
25 relevant daemon are required, one with the '-6' command line option.
27 For information on how to install, configure and run this software, as
28 well as how to find documentation and report bugs, please consult the
31 ISC DHCP uses standard GNU configure for installation. Please review the
32 output of "./configure --help" to see what options are available.
34 The system has only been tested on Linux, FreeBSD, and Solaris, and may not
35 work on other platforms. Please report any problems and suggested fixes to
39 Changes since 4.1.0 (new features)
41 - Failover port configuration can now be left to defaults (port 647) as
42 described in the -12 revision of the Failover draft (and assigned by
43 IANA). Thanks in part to a patch from David Cantrell at Red Hat.
45 - If configured, dhclient may now transmit to an anycast MAC address,
46 rather than using a broadcast address. Thanks to a patch from David
49 - Added client support for setting interface MTU and metric, thanks to
50 Roy "UberLord" Marples <roy@marples.name>.
52 - Added client -D option to specify DUID type to send.
54 - A new failover configuration parameter has been introduced for those
55 environments where DHCP servers can be reasonably guaranteed to be
56 "down" when the failover TCP socket is severed, "auto-partner-down".
57 This parameter is not generally safe, and by default is disabled, so
58 please carefully review the documentation of this parameter in the
59 dhcpd.conf(5) manpage before determining to use it yourself.
61 - Added a configuration function, 'gethostname()', which calls the system
62 function of the same name and presents the results as a data expression.
63 This function can be used to incorporate the system level hostname of
64 the system the DHCP software is operating on in responses or queries (such
65 as including a failover partner's hostname in a dhcp message or binding
66 scope, or having a DHCP client send any system hostname in the host-name or
67 FQDN options by default).
69 - The dhcp-renewal-time and dhcp-rebinding-time options may now be configured
70 for DHCPv4 operation and used independently of the dhcp-lease-time
71 calculations. Invalid renew and rebinding times (e.g., greater than the
72 determined lease time) are omitted.
74 Changes since 4.1.0 (bug fixes)
76 - Remove infinite loop in token_print_indent_concat().
78 - Validate the argument to the -p option.
80 - The notorious 'option <unknown> ... larger than buffer' log line,
81 which is seen in some malformed DHCP client packets, was modified.
82 It now logs the universe name, and does not log the length values
83 (which are bogus corruption read from the packet anyway). It also
84 carries a hopefully more useful explanation.
86 - Suppress spurious warnings from configure about --datarootdir
88 - A bug was fixed that caused the server not to answer some valid Solicit
89 and Request packets, if the dynamic range covering any requested addresses
90 had been deleted from configuration.
92 - Update the code to deal with GCC 4.3. This included two sets of changes.
93 The first is to the configuration files to include the use of
94 AC_USE_SYSTME_EXTENSIONS. The second is to deal with return values that
97 - The db-time-format option was documented in manpages.
99 - Using reserved leases no longer results in 'lease with binding state
100 free not on its queue' error messages, thanks to a patch from Frode
103 - Fix a build error in dhcrelay, using older versions of gcc with
106 - Two uninitialized stack structures are now memset to zero, thanks to a
107 patch from David Cantrell at Red Hat.
109 - Fixed a cosmetic bug where pretty-printing valid domain-search options would
110 result in an erroneous error log message ('garbage in format string').
112 - A bug in DLPI packet transmission (Solaris, HP/UX) that caused the server
113 to stop receiving packets is fixed. The same fix also means that the MAC
114 address will no longer appear 'bogus' on DLPI-based systems.
116 - A bug in select handling was discovered where the results of one select()
117 call were discarded, causing the server to process the next select() call
118 and use more system calls than required. This has been repaired - the
119 sockets will be handled after the first return from select(), resulting in
122 - The update-conflict-detection feature would leave an FQDN updated without
123 a DHCID (still currently implemented as a TXT RR). This would cause later
124 expiration or release events to fail to remove the domain name. The feature
125 now also inserts the client's up to date DHCID record, so records may safely
126 be removed at expiration or release time. Thanks to a patch submitted by
129 - Memory leak in the load_balance_mine() function is fixed. This would
130 leak ~20-30 octets per DHCPDISCOVER packet while failover was in use
133 - Various compilation fixes have been included for the memory related
134 DEBUG #defines in includes/site.h.
136 - Fixed Linux client script 'unary operator expected' errors with DHCPv6.
138 - Fixed setting hostname in Linux hosts that require hostname argument
139 to be double-quoted. Also allow server-provided hostname to
140 override hostnames 'localhost' and '(none)'.
142 - Fixed failover reconnection retry code to continue to retry to reconnect
143 rather than restarting the listener.
145 - Compilation on Solaris with USE_SOCKETS defined in includes/site.h has
146 been repaired. Other USE_ overrides should work better.
148 - A check for the local flavor of IFNAMSIZ had a broken 'else' condition,
149 that probably still resulted in the correct behaviour (but wouldn't use
150 a larger defined value provided by the host OS).
152 - Fixed a bug where an OMAPI socket disconnection message would not result
153 in scheduling a failover reconnection, if the link had not negotiated a
154 failover connect yet (e.g.: connection refused, asynch socket connect()
157 - A bug was fixed that caused the 'conflict-done' state to fail to be parsed
158 in failover state records.
160 ! A stack overflow vulnerability was fixed in dhclient that could allow
161 remote attackers to execute arbitrary commands as root on the system,
162 or simply terminate the client, by providing an over-long subnet-mask
163 option. CERT VU#410676 - CVE-2009-0692
165 - Fixed a bug where relay agent options would never be returned when
166 processing a DHCPINFORM.
168 - Versions 3.0.x syntax with multiple name->code option definitions is now
169 supported. Note that, similarly to 3.0.x, for by-code lookups only the
170 last option definition is used.
172 - Fixed a bug where a time difference of greater than 60 seconds between a
173 failover pair could cause the primary to crash on contact with the
174 secondary. Thanks to a patch from Steinar Haug.
176 - Don't look for IPv6 interfaces on Linux when running in DHCPv4 mode.
177 Thanks to patches from Matthew Newton and David Cantrell.
179 - Secondary servers in a failover pair will now perform ddns removals if
180 they had performed ddns updates on a lease that is expiring, or was
181 released through the primary. As part of the same fix, stale binding scopes
182 will now be removed if a change in identity of a lease's active client is
183 detected, rather than simply if a lease is noticed to have expired (which it
184 may have expired without a failover server noticing in some situations).
186 - A patch supplied by David Cantrell at RedHat was applied that detects
187 invalid calling parameters given to the ns_name_ntop() function.
188 Specifically, it detects if the caller passed a pointer and size pair
189 that causes the pointer to integer-wrap past zero.
191 ! Fixed a fenceposting bug when a client had two host records configured,
192 one using 'uid' and the other using 'hardware ethernet'. CVE-2009-1892
194 - Fixed the check in the dhcp_interface_signal_handler routine to verify
195 the existence of the linked signal handler before calling it.
197 - Both host and subnet6 configuration groups are now included whether a
198 fixed-address6 (DHCPv6) is in use or not. Host scoped configuration takes
199 precedence. This fixes two bugs, one where host scoped configuration
200 would not be included from a non-fixed-address6 host record, and the equal
201 and opposite bug where subnet6 scoped configuration would not be used when
202 over-riding vlaues were not present in a matching fixed-address6 host
205 - ./configure now checks to ensure the intX_t and u_intX_t types are defined,
206 correcting a compilation failure when using Sun's compiler.
208 Changes since 4.1.0b1
210 - A missing "else" in dhcrelay.c could have caused an interface not to
213 Changes since 4.1.0a2
215 - A cosmetic bug in DHCPDECLINE processing was fixed which caused all
216 successful DHCPDECLINEs to be logged as "not found" rather than
219 - Added configuration file examples for DHCPv6.
221 - Some failover debugging #defines have been better defined and some
222 high frequency messages moved to a deeper debugging symbol.
224 - The CLTT parameter in failover is now only updated by client activity,
225 and not by failover binding updates (taking on the peer's CLTT).
227 - Failover BNDUPD messages are now discarded if they conflict with an
228 update that has been transmitted, but not acknowledged.
230 - A bug cleaning up unknown-xxx temporary option definitions was fixed.
232 - Delayed-ack is now a compile-time option, compiled out by default.
233 This feature is simply too experimental for right now, and causes
234 some problems to some failover installations. We will revisit this
237 - The !inet_pton() call in res_mkupdrec was adjusted to '<= 0' as
238 inet_pton returns either 1, 0, or -1.
240 - A dhclient-script for MacOS X has been included, which enables
241 'dhclient -6' support.
243 - DDNS removal routines were updated so that the DHCID is not removed until
244 the client has been deprived of all A and AAAA records (not only the last
245 one of either of those). This resolves a bug where dual stack clients
246 would not be able to regain their names after either expiration event.
248 Changes since 4.1.0a1
250 - Corrected list of failover state values in dhcpd man page.
252 - Fixed a bug that caused some request types to be logged incorrectly.
254 - Clients that sent a parameter request list containing the
255 routers option before the subnet mask option were receiving
256 only the latter. Fixed.
258 - The server wasn't always sending the FQDN option when it should.
260 - A partner-down failover server no longer emits 'peer holds all free leases'
261 if it is able to newly-allocate one of the peer's leases.
263 - Fixed a coredump when adding a class via OMAPI.
265 - Check whether files are zero length before trying to parse them.
267 - Ari Edelkind's PARANOIA patch has been included and may be compiled in
268 via two ./configure parameters, --enable-paranoia and
269 --enable-early-chroot.
271 - ./configure was extended to cover many optional build features, such
272 as failover, server tracing, debugging, and the execute() command.
274 - There is now a default 1/4 of a second scheduled delay between delayed
275 fsync()'s, it can be configured by the max-ack-delay configuration
278 - A bug was fixed where the length of a hostname was miscalculated, so that
279 hosts were given odd-looking domain names ("foo.bar.ba.example.com").
281 - Shared network selection should be done from the innermost relay
282 valid link-address field, rather than the outermost.
284 - Prefix pools are attached to shared network scopes.
286 - Merged IA_XX related structures.
288 - Add DHCPv6 files in configure.
290 - A memory leak when using omapi has been fixed.
292 - DHCPv6 vendor-class options (VSIO) are now only sent when they appear
293 on the DHCPv6 ORO. This resolves a bug where VSIO options were placed
294 in IA_NA encapsulated options fields.
296 - Integrated client with stateless, temporary address and prefix delegation
299 - A double-dereference in dhclient transmission of DHCPDECLINEs was
302 - Fix handling of format code 'Z'.
304 - Support "-1" argument in DHCPv6.
306 - Merge DHCPv6-only "dhcrelay6" into general-purpose "dhcrelay" (use
307 "-6" option to select DHCPv6 mode).
309 - Fix handling of -A and -a flags in dhcrelay; it was failing to expand
310 packet size as needed to add relay agent options.
312 - A bug in subnet6 parsing where options contained in subnet6 clauses would
313 not be applied to clients addressed within that network was repaired.
315 - When configuring a "subnet {}" or "subnet6 {}" without an explicit
316 shared-network enclosing it, the DHCP software would synthesize a
317 shared-network to contain the subnet. However, all configuration
318 parameters within the subnet more intuitively belong "to any client
319 on that interface", or rather the synthesized shared-network. So,
320 when a shared-network is synthesized, it is used to contain the
321 configuration present inside the subnet {} clause. This means that
322 the configuration will be valid for all clients on that network, not
323 just those addressed out of the stated subnet. If you intended the
324 opposite, the workaround is to explicitly configure an empty
327 - A bug was fixed where Information-Request processing was not sourcing
328 configured option values.
330 - A warning was added since the DHCPv6 processing software does not yet
331 support class statements.
333 - Compliation warnings on GCC 4.3 relating to bootp source address
334 selection were repaired.
336 - The v6 BSD socket method was updated to use a single UDP BSD socket
337 no matter how many interfaces are involved, differentiating the
338 interfaces the packets were received on by the interface index supplied
341 - The relay agent no longer listens to the All DHCP Servers Multicast
344 - A bug was fixed in data_string_sprintfa() where va_start was only called
345 once for two invocations of vsprintf() variants.
347 - ERO (RFC 4994) server support.
349 - Basic and partial DHCPv6 leasequery support.
351 - Reliable DHCPv6 release (previous behavior, send release and exit, is
352 still available with dhclient -6 -1 -r).
354 Changes since 4.0.0 (new features)
356 - Added DHCPv6 rapid commit support.
358 - Added explicit parser support for zero-length DHCP options, such as
359 rapid-commit, via format code 'Z'.
361 - It's now possible to update the "ends" field of a lease with OMAPI.
362 This is useful if you want not only to release a lease, but also make
363 it available for reuse right away. Hat tip to Christof Chen.
365 - Fixed definition of the iaaddr hash functions to use the correct
366 functions when referencing and dereferencing memory.
368 - Some definitions not in phase with the IANA registry were updated.
370 - Allocated interface IDs are better controlled ('u' bit set to zero,
371 reserved IDs avoided).
373 - Unicast options are taken into account only for RENEWs.
375 - NoAddrsAvail answers to SOLICITs are always ADVERTISEs even when a SOLICIT
376 carries a rapid-commit option.
378 - Return in place of raise an impossible condition when one tries to release
379 an empty active lease.
381 - Timer granularity is now 1/100s in the DHCPv6 client.
383 - The dhclient-script was updated to create a host route for the default
384 gateway if the supplied subnet mask for an IPv4 address was a /32. This
385 allows the client to work in 'captive' network environments, where the
386 operator does not want clients to crosstalk directly.
388 - MINUS tokens should be parseable again.
390 - Multiple (up to "delayed-ack x;" maximum) DHCPv4 packets are now queued and
391 released in bursts after single fsync() events when the upper limit is
392 reached or if the receiving sockets go dry. The practical upshot is
393 that fsync-coupled server performance is now multiplicitively increased.
394 The default delayed ack limit is 28. Thanks entirely to a patch from
397 Changes since 4.0.0 (bug fixes)
399 - DHCP now builds on AIX.
401 - Exit with warning when DHCPv6-specific statements are used in the
402 config file but -6 is not specified.
404 - Fixed "--version" flag in dhcrelay
406 - The 'min-secs' configuration parameter's log message has been updated to
409 - The warning logged when an address range doesn't fit in the subnets
410 they were declared has been updated to be more helpful and identify the
411 typo in configuration that created the spanning addresses.
413 - A bug in failover pool rebalancing that caused POOLREQ message ping-pongs
416 - A flaw in failover pool rebalancing that could cause POOLREQ messages to
417 be sent outside of the min-balance/max-balance scheduled intervals has
420 - A cosmetic bug during potential-conflict recovery that caused the peer's
421 'conflict-done' state message to be logged as 'unknown-state' has been
422 repaired. It is now logged correctly.
424 - A bug was fixed where the 'giaddr' may be used to find the client's subnet
425 rather than its own 'ciaddr'.
427 - A log message was introduced to clarify the situation where a failover
428 'address' parameter (the server's local address) did not resolve to an
431 - The minimum site code value was set to 224 in 3.1.0 to track RFC3942. This
432 broke a lot of legacy site local configurations. The new code in place will
433 track site local space minimum option codes and logs a warning to encourage
434 updates and exploration of site local code migration problems. Option
435 codes less than 128 in site local spaces remain inaccessible.
437 - A possible relay agent option bug was repaired where random server
438 initialization state may have been used to signal the relay agent
439 information options sub-option code for the 'END' of the option space.
441 - Fixes to allow code to compile and run on Solaris 9.
443 - Fixes to allow code to compile on Mac OS X Leopard (10.5).
445 - When server is configured with options that it overrides, a warning is
446 issued when the configuration file is read, rather than at the time the
447 option is overridden. This was important, because the warning was given
448 every time the option was overridden, which could create a lot of
451 - Fixed a compilation problems on platforms that define a value for FDDI,
452 which conflicts with a dhcp configuration syntax token by the same name.
454 - When a failover server suspects it has encountered a peer running a
455 version 3.0.x failover server, a warning that the failover wire protocol
456 is incompatible is printed.
458 - The failover server no longer issues a floating point error if it encounters
459 a previously undefined option code.
461 - Fix startup error messages to report a missing "subnet6 declaration", rather
462 than a missing "subnet declaration", when running as a DHCPv6 server.
464 - DHCPv6 client timestamp in DUID was based on the year 1970 rather
467 - Warn when attempting to use a hardware parameter in DHCPv6.
469 - DHCPv6 released resources are now marked as released by the client.
471 - 'Soft' bindings have no more side-effects.
473 Changes since 4.0.0b3
475 - The reverse dns name for PTR updates on IPv6 addresses has been fixed to
476 use ip6.arpa. rather than default to in-addr.arpa and require user
479 - dhc6_lease_destroy() and dhc6_ia_destroy() now set lease and IA pointers
480 to NULL after freeing, to prevent subsequent accesses to freed memory.
482 - The DHCPv6 server would not send the preference option unless the
483 client requested it, via the ORO. This has been fixed, so the DHCPv6
484 server will always send the preference value if it is configured.
486 - When addresses were passed as hints to the server in an IA, they were
487 incorrectly handled, sometimes being treated as an error. Now the
488 server will treat these as hints and ignore them if it cannot supply
491 - If the client had multiple addresses, and one expired (was not renewed
492 by the server), the client would continue to attempt to renew the same
493 old address over and over. Now, the client will omit any expired
494 addresses from future Confirm, Renew, or Rebind messages.
496 - dhclient -6 will now select renew/rebind timers based upon the longest
497 address expiration time rather than the shortest expiration time, in
498 order to avoid cascading renewals in the event a server elects not to
499 extend one of multiple IAADDR leases.
501 - The server now limits clients that request multiple addresses to one
502 address per IA by default, which can be adjusted through the
503 "limit-addrs-per-ia" configuration option.
505 - The DHCPv6 client now issues fresh transaction IDs on Renew and Rebind
506 message exchanges, rather than using the most recent ID.
508 - The DHCPv6 server now replies to Information-Request messages.
510 - A bug was fixed in the dhclient-script for BSDs to correctly carry error
511 codes through some conditions.
513 - The parsing of some options in the dhclient lease file, in particular
514 the success DHCPv6 status-code, was fixed.
516 - A bug was fixed that caused the DHCPv6 ORO option to be corrupted with
517 seemingly random values.
519 - A reference overleak in DHCPv6 shared network processing was repaired.
521 - ./configure now autodetects local database locations rather than trying
522 to put dhcpd.leases and dhclient.leases in /usr/local/var/db, which no
525 - Regression fix for bug where server advertised a IPv6 address in
526 response to a SOLICIT but would not return the address in response
529 - A bug was fixed where the DHCPv6 server puts the NoAddrsAvail status
530 code in the IA_NA was fixed. The status code now appears in the root
533 Changes since 4.0.0b2
535 - Clarified error message when lease limit exceeded
537 - Relative time may now be used as a qualifier for 'allow' and 'deny' access
538 control lists. These directives may be used to assist in re-addressing
539 address pools without having to constantly reconfigure the server. Please
540 see 'man dhcpd.conf' for more information on allow/deny 'after time' syntax.
541 Thanks to a patch from Christof Chen.
543 - The server will now include multiple IA_NA's and multiple IAADDRs within
544 them, if advertised by the client. It still only seeks to allocate one
547 Changes since 4.0.0b1
549 - Use different paths for PID and lease files when running in DHCPv4
550 or DHCPv6 mode, so that servers for both protcols can be run
551 simultaneously on a single interface.
553 - Fixed a buffer overflow error which could have allowed a denial
554 of service under unusual server configurations
556 - Eliminated a spurious error message from the client
558 - A number of bugs with the internal handling of lease state on the
559 server have been fixed. Some of these could cause server crashes.
561 - The peer_wants_leases() changes pulled up from 3.1.0 were corrected,
562 'never used' leases will no longer consistently shift between servers
563 on every pool rebalance run.
565 - sendmsg()/recvmsg() control buffers are now declared in such a way to
566 ensure they are correctly aligned on all (esp. 64-bit) architectures.
568 - The client leasing subsystem was streamlined and corrected to account
569 more closely for changes in client link attachment selection.
571 Changes since 4.0.0a3
573 - The DHCP server no longer requires a "ddns-update-style" statement,
574 and now defaults to "none", which means DNS updates are disabled.
576 - Log messages when failover peer names mismatch have been improved to
577 point out the problem.
579 - Bug where server advertised a IPv6 address in response to a SOLICIT
580 but would not return the address in response to a REQUEST. Thanks to
581 Dennis Kou for finding the bug.
583 - Fixed an error causing the server to lock up on lease expiration,
584 reported independently by Jothilingam Vasu and Dennis Kou.
586 - Fixed a ./configure bug where compile tests were failing due to
587 "-Werror" (unused variable) rather than the actual test failure. Lead
588 to inconsistent and unworkable auto-configurations.
590 - Compilation with DLPI and -Werror has been repaired.
592 - Error in decoding IA_NA option if multiple interfaces are present
593 fixed by Marcus Goller.
595 - DHCPv6 server Confirm message processing has been enhanced - it no
596 longer replies only to clients with host {} records, it now replies
597 as directed in RFC3315 section 18.2.2 - that is, to all clients
598 regardless of the existence of bindings.
600 - A core dump during expired lease cleanup has been repaired.
602 - DDNS updates state information are now stored in 'binding scopes' that
603 follow the leases through their lifecycles. This enables DDNS teardowns
604 on leases that are assigned and expired inbetween a server restart (the
605 state is recovered from dhcpd.leases). Arbitrary user-specified binding
606 scopes ('set var = "value";') are not yet supported.
608 - Additional compilation problems on HP/UX have been repaired.
610 Changes since 4.0.0a2
612 - Fix for startup where there are no IPv4 addresses on an interface.
613 Thanks to Marcus Goller for reporting the bug.
615 - Fixed file descriptor leak on listen failure. Thanks to Tom Clark.
617 - Bug in server configuration parser caused server to get stuck on
618 startup for certain bad pool declarations. Thanks to Guillaume
619 Knispel for the bug report and fix.
621 - Code cleaned to remove warnings reported by "gcc -Wall".
623 - DHCPv6 is now the default. You can disable DHCPv6 support using the
624 "--disable-dhcpv6" flag when you run the configure script.
626 - An internal database inconsistency bug was repaired where the server
627 would segfault if a client attempted to renew a lease that had been
628 loaded from persistent storage.
630 - 'request' and 'also request' syntaxes have been added to accommodate
631 the DHCPv6 client configuration. 'send dhcp6.oro' is no longer
634 - Bug fixed where configuration file parsing did not work with
635 zero-length options; this made it impossible to set the
638 - Bogus messages about host records with IPv4 fixed-addresses being of
639 non-128-bits in length were removed.
641 Changes since 4.0.0a1
643 - Bug in octal parsing fixed. Thanks to Bernd Fuhrmann for the report
646 - Autoconf now supplies proper flags for Solaris DHCPv6 builds.
648 - Fix for parsing error on some IPv6 addresses.
650 - Invalid CIDR representation for IPv6 subnets or ranges now checked
651 for when loading configuration.
653 - Compilation on HP/UX has been repaired. The changes should generally
654 apply to any architecture that supplies SIOCGLIFCONF but does not
655 use 'struct lifconf' structures to pass values.
657 - Two new operators, ~= and ~~, have been integrated to implement
658 boolean matches by regular expression (such as may be used in
659 class matching statements). Thanks to a patch by Alexandr S.
660 Agranovsky, which underwent slight modification.
662 - Fix for icmp packets on 64-bit systems (bug introduced in 4.0).
664 - A bug was fixed in interface discovery wherein an error identifying
665 a server-configured interface with no IPv4 addresses would SEGV.
667 - Fixed a bug in which write_lease() might report a failure incorrectly
669 - Added support for DHCPv6 Release messages
671 - Added -x option to dhclient, which triggers dhclient processes
672 to exit gracefully without releasing leases first
674 - All binaries (client, server, relay) now change directories
675 to / before going into daemon mode, so as not to hold $CWD open
677 - Fixed a bug parsing DHCPv6 client-id's in host-identifier statements
679 - Fixed a bug with the 'ddns-updates' boolean server configuration
680 parameter, which caused the server to fail.
682 Changes since 4.0.0-20070413
684 - Old (expired) leases are now cleaned.
686 - IPv6 subnets now have support for arbitrary allocation ranges via
687 a new 'range6' configuration directive.
689 - An obviated option code hash lookup to find D6O_CLIENTID was removed.
691 - Corrected some situations where variables might be used without being
694 - Silenced several other compiler warnings.
696 - Include the more standard sys/uio.h rather than rely upon other
697 header files to include it (fixes a BSD 4.2 compile failure).
699 - Duplicate dhclient-script updates for DHCPv6 to all provided scripts.
701 - DHCPv4 I/O methods that failed to sense hardware address were corrected.
703 - DHCPv4 is now the default (as documented) rather than DHCPv6. The default
704 was set to DHCPv6 to facilitate ease early development, and forgotten.
706 - Corrected a segmentation violation in DHCPv4 socket processing.
708 - dhclient will now fork() into the background once it binds to an
709 IPv6 address, or immediately if the -n flag is supplied.
711 - -q is now the default behaviour on dhclient, with -d or -v enabling
712 non-quiet (stderr logging) mode.
714 - Fix documentation of the domain-search atom (quoted, with commas).
716 - Document DHCPv6 options presently in the default table.
718 - Replaced ./configure shellscripting with GNU Autoconf.
720 Changes since 3.1.0 (NEW FEATURES)
722 - DHCPv6 Client and Server protocol support. Use '-6' to run the daemons
723 as v6-only. Use '-4' to run the daemons as v4-only (default. There is
724 no support currently for both.
726 - Server support for multiple IA_NA options, containing at most one
729 - Client support for one IA_NA option, containing any number of IAADDR
732 - Server support for the DHCPv6 Information-request message.
734 - Inappropriate unicast DHCPv6 messages sent to the server are now
735 discarded, and this has rearchitected the IO system slightly.
737 - The DHCPv6 server DUID defaults to type 1, is persistently stored in
738 the leases database, and can be over-ridden (either completely, or by
739 specifying type 1 or type 2).
741 - The server only uses Rapid-Commit if it has been configured with the
742 Rapid-Commit option and the client requests it.
744 - DDNS support. We now update AAAA records in the same place we would
745 update A records, if we have an IPv6 address. We also generate IP6.ARPA
746 style names for PTR records if we're dealing with an IPv6 address. Both
747 A and AAAA updates are done using the same 'fqdn.' virtual option space
748 (although the DHCPv4 FQDN and DHCPv6 FQDN options are formatted
749 differently, they both use the same code here).
751 - The Linux dhclient-script attempts to set and remove assigned addresses,
752 and to configure /etc/resolv.conf from nameserver and domain name
753 configurations. It can be extended to configure other parameters.
755 - Initial DHCPv6 lease support.
757 - The IO system now tracks all local IP addresses, so that the DHCP
758 applications (particularly the dhcrelay) can discern between what frames
759 were transmitted to it, and what frames are being carried through it which
760 it should not intercept.
762 Changes since 3.1.0 (Maintenance)
764 - A bug was repaired where MAC Address Affinity for virgin leases always
765 mapped to the primary. Virgin leases now have an interleaved preference
766 between primary and secondary.
768 - A bug was repaired where MAC Address Affinity for clients with no client
769 identifier was sometimes mishashed to the peer. Load balancing during
770 runtime and pool rebalancing were opposing.
772 - An assertion in lease counting relating to reserved leases was repaired.
774 - The subnet-mask option inclusion now conforms with RFC2132 section 3.3;
775 it will only appear prior to the routers option if it is present on the
776 Parameter-Request-List. The subnet-mask option will also only be
777 included by default (if it is not on the PRL) in response to DISCOVER
780 - The FQDN option is only supplied if the client supplied an FQDN option or
781 if the FQDN option was explicitly requested on the PRL.
783 - Dynamic BOOTP leases are now load balanced in failover.
785 Changes since 3.1.0rc1
787 - The parse warning that 'deny dyanmic bootp;' must be configured for
788 failover protected subnets was removed.
790 Changes since 3.1.0b2
792 - Failover rebalance events no longer play ping pong with round errors
793 (moving leases between free and back to backup where there are an
794 odd number of leases).
796 - The 'pool' log line has been split into two messages, one before the
797 rebalance run, and one after.
799 - Any queued BNDACKs are transmitted before transmitting new BNDUPDs.
800 This enforces the correct sequence of events for the remote server
801 processing these messages.
803 Changes since 3.1.0b1
805 - Fixed a bug that caused OMAPI clients to freeze when opening lease
808 - A new server config option "fqdn-reply" specifies whether the server
809 should send out option 81 (FQDN). Defaults to "on". If set to "off",
810 the FQDN option is not sent, even if the client requested it. This is
811 needed because some clients misbehave otherwise. Thanks to Christof Chen
814 - Allow trace output files (-tf option) to be overwritten, rather than
815 crashing dhcpd if the file already exists
817 - A bug was fixed that caused dhcpd to segfault if a pool was declared
818 outside the scope of a subnet in dhcpd.conf.
820 - Some uninitialized values were repaired in dhcpleasequery.c that
821 caused the server to abort.
823 - A new server config option, 'do-reverse-updates', has been added
824 which causes the server to abstain from performing updates on PTR
825 records. Thanks to a patch from Christof Chen at Allianz.
827 - A bug was repaired in subencapsulation support, where spaces separated
828 by empty spaces would not get included.
830 - A bug in dhclient was repaired which caused it to send parameter request
831 lists of 55 bytes in length no matter how long the declared PRL was.
833 - 'dhcp.c(3953): non-null pointer' has been repaired. This fixes a flaw
834 wherein the DHCPv4 server may ignore a configured server-identifier.
836 - A flaw in failover startup sequences was repaired that sometimes left
837 the primary DHCP server's pool rebalance schedules unscheduled.
839 - Corrected a flaw that broke encapsulated spaces included due to presence
840 on the parameter request list.
842 Changes since 3.1.0a3
844 - Some spelling fixes.
846 Changes since 3.1.0a2
848 - A bug was fixed where attempting to permit leasequeries results in a
849 fatal internal error, "Unable to find server option 49".
851 - A bug was fixed in dhclient rendering the textual output form of the
852 domain-search option syntax.
854 Changes since 3.1.0a1
856 - A bug in the FQDN universe that added FQDN codes to the NWIP universe's
857 hash table was repaired.
859 - The servers now try harder to transmit pending binding updates when
860 entering normal state.
862 - UPDREQ/UPDREQALL handling was optimized - it no longer dequeues and
863 requeues all pending updates. This should reduce the number of spurious
864 'xid mismatch' log messages.
866 - An option definition referencing leak was fixed, which resulted in early
867 termination of dhclient upon the renewal event.
869 - Some default hash table sizes were tweaked, some upwards, some downwards.
870 3.1.0a1's tables resulted in a reduction in default server memory use.
871 The new selected values provide more of a zero sum (increasing the size
872 of tables likely to be populated, decreasing the size of tables unlikely).
874 - Lease structures appear in three separate hashes: by IP address, by UID,
875 and by hardware address. One type of table was used for all three, and
876 improvements to IP address hashing were applied to all three (so UID and
877 hardware addresses were treated like 4-byte integers). There are now two
878 types of tables, and the uid/hw hashes use functions more appropriate
881 - The max-lease-misbalance percentage no longer causes scheduled rebalance
882 runs to be skipped: it still governs the schedule, but every scheduled
883 run will attempt balance.
885 - A segfault bug in recursive encapsulation support has been corrected.
887 Changes since 3.0 (New Features)
889 - A workaround for certain STSN servers that send a mangled domain-name
890 option was introduced for dhclient. The client will now accept corrupted
891 server responses, if they contain a valid DHCP_MESSAGE_TYPE (OFFER, ACK,
892 or NAK). The server will continue to not accept corrupt client packets.
894 - Support for 'reserved' (pseudo-static) and BOOTP leases via failover
897 - Support for adding, removing, and managing class and subclass statements
900 - The failover implementation was updated to comply with revision 12 of
903 - 'make install' now creates the initial zero-length dhcpd.leases file if
904 one does not already exist on the system.
906 - RFC3942 compliance, site-local option spaces start at 224 now, not 128.
908 - The Load Balance Algorithm was misimplemented. The current implementation
911 - lcase() and ucase() configuration expressions have been added which adjust
912 their arguments from upper to lower and lower to upper cases respectively.
913 Thanks to a patch from Albert Herranz.
915 - The dhclient 'reject ...;' statement, which rejects leases given by named
916 server-identifiers, now permits address ranges to be specified in CIDR
917 notation. Thanks to a patch from David Boyce.
919 - The subnet-mask option is now supplied by default, but at lowest
920 priority. This helps a small minority of clients that provide parameter
921 request lists, but do not list the subnet-mask option because they were
922 designed to interoperate with a server that behaves in this manner.
924 - The FQDN option is similarly supplied even if it does not appear on the
925 parameter request list, but not to the exclusion of options that do
926 appear at the parameter request list. Up until now it had ultimate
927 priority over the client's parameter request list.
929 - Varying option space code and length bit widths (8/16/32) are now
930 supported. This is a milestone in achieving RFC 3925 "VIVSO" and
933 - A new common (server or client) option, 'db-time-format local;', has
934 been added which prints the local time in /var/db/dhcpd.leases rather
935 than UTC. Thanks to a patch from Ken Lalonde.
937 - Some patches to improve DHCP Server startup speed from Andrew Matheson
938 have been incorporated.
940 - Failover pairs now implement 'MAC Affinity' on leases moving from the
941 active to free states. Leases that belonged to the failover secondary
942 are moved to BACKUP state rather than FREE upon exiting EXPIRED state.
943 If lease rebalancing must move leases, it tries first to move leases
944 that belong to the peer in need.
946 - The server no longer sends POOLREQ messages unless the pool is severely
947 misbalanced in the peer's favor (see 'man dhcpd.conf' for more details).
949 - Pool rebalance events no longer happen upon successfully allocating a
950 lease. Instead, they happen on a schedule. See 'man dhcpd.conf' for the
951 min-balance and max-balance statements for more information.
953 - The DHCP Relay Agent Information Option / Link Selection Sub-Option
954 is now supported. (See RFC3527 for details).
956 - A new DDNS related server option, update-conflict-detection, has been
957 added. If this option is enabled, dhcpd will perform normal DHCID
958 conflict resolution (the default). If this option is disabled, it will
959 instead trust the assigned name implicitly (removing any other bindings
960 on that name). This option has not been made available in dhclient.
962 - In those cases where the DHCP software manufactures an IP header (to
963 transmit via bpf, lpf, etc), the IP TTL the software selects has been
964 increased from 16 to 128. This is intended to match Microsoft Windows
965 DHCP Client behaviour, to increase compatibility.
967 - 'ignore client-updates;' now has behaviour that is different from
968 'deny client-updates;'. The client's request is not truly ignored,
969 rather it is encouraged. Should this value be configured, the server
970 updates DNS as though client-updates were set to 'deny'. That is, it
971 enters into DNS whatever it is configured to do already, provided it is
972 configured to. Then it sends a response to the client that lets the
973 client believe it is performing client updates (which it will), probably
974 for a different name. In essence, this lets the client do as it will,
975 ignoring this aspect of their request.
977 - Support for compressed 'domain name list' style DHCP option contents, and
978 in particular the domain search option (#119) was added.
980 - The DHCP LEASEQUERY protocol as defined in RFC4388 is now implemented.
981 LEASEQUERY lets you query the DHCP server for information about a lease,
982 using either an IP address, MAC address, or client identifier. Thanks
983 to a patch from Justin Haddad.
985 - DHCPD is now RFC2131 section 4.1 compliant (broadcast to all-ones ip and
986 ethernet mac address) on the SCO platform specifically without any strange
987 ifconfig hacks. Many thanks go to the Kroger Co. for donating the
988 hardware and funding the development.
990 - A new common configuration executable statement, execute(), has been
991 added. This permits dhcpd or dhclient to execute a named external
992 program with command line arguments specified from other configuration
993 language. Thanks to a patch written by Mattias Ronnblom, gotten to us
996 - A new dhcp server option 'adaptive-lease-time-threshold' has been added
997 which causes the server to substantially reduce lease-times if there are
998 few (configured percentage) remaining leases. Thanks to a patch submitted
1001 - Encapsulated option spaces within encapsulated option spaces is now
1004 Changes since 3.0.6rc1
1006 - supersede_lease() now requeues leases in their respective hardware
1007 address hash bucket. This mirrors client identifier behaviour.
1011 - Assorted fixes for broken network devices: Packet length is now
1012 determined from the IP header length field to finally calculate the
1013 UDP payload length, because some NIC drivers return more data than
1014 they actually received.
1016 - UDP packets are now stored in aligned data structures.
1018 - A logic error in omapi interface code was repaired that might result in
1019 incorrectly indicating 'up' state when any flags were set, rather than
1020 specifically the INTERFACE_REQUESTED flag. Thanks to a patch from
1021 Jochen Voss which got to us via Andrew Pollock at Debian.
1023 - A reference leak on binding scopes set by ddns updates was repaired.
1025 - A memory leak in the minires_nsendsigned() function call was repaired.
1026 Effectively, this leaked ~176 bytes per DDNS update.
1028 - In the case where an "L2" DHCP Relay Agent (one that does not set giaddr)
1029 was directly attached to the same broadcast domain as the DHCP server,
1030 the RFC3046 relay agent information option was not being returned to the
1031 relay in the server's replies. This was fixed; the dhcp server no longer
1032 requires the giaddr to reply with relay agent information. Note that
1033 this also improves compatibility with L2 devices that "intercept" DHCP
1034 packets and expect relay agent information even in unicast (renewal)
1035 replies. Thanks to a patch from Pekka Silvonen.
1037 - A bug was fixed where the BOOTP header 'sname' field had a value, the
1038 copy written to persistent storage was actually the contents of the
1041 - A bug was fixed where the nwip virtual option space was referencing
1042 the fqdn option's virtual option space's option cache.
1044 - Timestamp parsing errors that indicated missing "minutes" fields rather
1045 than the actually missing "seconds" fields have been repaired thanks to
1046 a patch from Kevin Steves.
1048 - A grammar error in the dhclient.8 manpage was repaired thanks to a patch
1051 - Several spelling typos were repaired, and some cross-references to other
1052 relevant documents were included in the manpages, thanks to a patch
1053 by Andrew Pollock which got to us via Tomas Pospisek.
1055 - Some bugs were fixed in the 'emergency relay agent options hologram'
1056 which is used to retain relay agent option contents from when the
1057 client was in INIT or REBIND states. This should solve problems where
1058 relay agent options were not echoed from the server, even when giaddr
1061 - dhclient now closes its descriptor to dhclient.leases prior to executing
1062 dhclient-script. Thanks to a patch from Tomas Pospisek.
1064 - The server's "by client-id" and "by hardware address" hash table lists
1065 are now sorted according to the preference to re-allocate that lease to
1066 returning clients. This should eliminate pool starvation problems
1067 arising when "INIT" clients were given new leases rather than presently
1070 Changes since 3.0.5rc1
1072 - A bug was repaired in fixes to the dhclient, which sought to run the
1073 dhclient-script with the 'EXPIRE' state should it receive a NAK in
1074 response to a REQUEST. The client now iterates the PREINIT state
1075 after the EXPIRE state, so that interfaces that might be configured
1076 'down' can be brought back 'up' and initialized.
1078 - DHCPINFORM handling for clients that properly set ciaddr and come to the
1079 server via a relay aget has been repaired.
1083 - A warning that host statements declared within subnet or shared-network
1084 scopes are actually global has been added.
1086 - The default minimum lease time (if min-lease-time was not specified)
1087 was raised from 0 to 300. 0 is not thought to be sensible, and is
1088 known to be damaging.
1090 - Added additional fatal error sanity checks surrounding lease binding
1091 state count calculations (free/active counts used for failover pool
1094 - Some time value size fixes in 3.0.4 brought on from FreeBSD /usr/ports were
1095 misapplied to server values rather than client values. The server no longer
1096 advertises 8-byte lease-time options when on 64-bit platforms.
1098 - A bug where leases not in ACTIVE state would get billed to billed classes
1099 (classes with lease limitations) was fixed. Non-active leases OFFERed
1100 to clients are no longer billed (but billing is checked before offering).
1102 - The dhcpd.conf.5 manpage was updated in regard to the ddns-domainname
1103 configuration option - the default configuration and results should be
1106 - If the dhclient were to receive a DHCPNAK while it was in the RENEW
1107 state (and consequently, had an active, 'bound' address and related
1108 configuration options), it would fail to 'tear down' this information
1109 before proceeding into INIT state. dhclient now iterates the dhclient-
1110 script with the 'EXPIRE' action to cause these teardowns prior to entering
1111 INIT state. Thanks to a patch from Chris Zimmerman.
1113 - The omapi.1 manpage had some formatting errors repaired thanks to a patch
1114 from Yoshihiko Sarumaru.
1116 - A few lines of code that were failover-specific were moved within
1117 #if defined() clauses so that compilation without failover could be
1120 - The log message emitted when the 'leased-address' value was not available
1121 in dhcpd.conf "executable statements" has been updated to be more helpful.
1122 Manpage information for this value has also been updated.
1124 - Abandoned or dissociated (err condition) leases now remove any related
1125 dynamic dns bindings. Thanks to a patch from Patrick Schoo.
1127 - Attempting to write a new lease file to replace a corrupt (due to
1128 encountering non-retryable errors during writing) lease file should
1129 no longer result in an infinite recursion.
1131 - Host declaration hardware addresses and client identifiers may only be
1132 configured once. dhcpd will now fail to load config files that specify
1133 multiple identifiers (previous versions would silently over-ride the
1134 value with the later configured value).
1136 - Several option codes that have been allocated since our last release
1137 have been named and documented.
1139 - Option names of the form "unknown-123" have been removed from the in-
1140 memory hash tables. In order to support options of these names that
1141 may appear in dhclient.leases or similar in previous versions, the
1142 parser will now find the new option code definition, or mock up a
1143 generic option code definition. This should result in a smooth
1144 transition from one name to the other, as the new name is used to
1147 Changes since 3.0.4rc1
1149 - The dhcp-options.5 manpage was updated to correct indentation errors
1150 thanks to a patch from Jean Delvare.
1152 Changes since 3.0.4b3
1154 - Some manual pages were clarified pursuant to discussion on the dhcp-server
1157 Changes since 3.0.4b2
1159 - Null-termination sensing for certain clients that unfortunately require
1160 it in DHCPINFORM processing was repaired.
1162 - The host-name option and a few others were moved from "X" format to "t"
1163 format to be compatible with new NULL handling functions.
1165 - DHCPINFORM processing is a little more careful about return addressing
1166 its responses, or if responding via a relay. The INFORM related
1167 messages also log the 'effective client ip address' rather than the
1168 client's supplied ciaddr (since some clients produce null ciaddrs).
1170 - The server was inappropriately sending leases to the RESET state in the
1171 event that multiple active leases were found to match a singly-identified
1172 client. This was changed to RELEASED (by accepting a different, ACTIVE
1173 binding, the client is implicitly releasing its lease). This repairs a
1174 bug wherein secondary servers in failover pairs detecting this condition
1175 move leases to RESET, and primaries refuse to accept that state
1176 transition (properly).
1178 - The memset-after-dmalloc() changes made in 3.0.4b1 have been backed out.
1180 Changes since 3.0.4b1
1182 - Command line parsing in omshell was repaired - it no longer closes
1183 STDIN after reading one line.
1185 - The resolver library no longer closes the /etc/resolv.conf file
1186 descriptor it opened twice.
1188 - Changes to trailing NULL removal in 't' option-atoms has been rethought,
1189 it now includes 'd' (domain name) types, and tries hard not to rewind an
1190 option beyond the start of the text field it is un-terminating.
1194 - A DDNS update handling function was misusing the DNS error codes, rather
1195 than the internal generic result enumeration. The result is a confusing
1196 syslog line, logging the wrong condition.
1198 - The DHCP Server was not checking pool balance in the case where it brought
1199 a non-ACTIVE lease out of storage for a client that was returning to use
1200 a lease it once had long ago, and had since expired.
1202 - Failover peers no longer bother to look for free leases to allocate when
1203 they already found the client's ACTIVE lease. DISCOVERs are load balanced
1204 whether freely-allocated or not, unless the server doubts the peer has
1207 - Fixed a bug in dhcrelay agent addition code that suppressed trailing
1208 PAD options - it was suppressing only one trailing PAD option, rather
1209 than the entire block of them.
1211 ! Fixed some unlikely overlapping-region memcpy() bugs in dhcrelay agent
1212 option addition and stripping code. Added a few sanity checks. Although
1213 highly improbable, due to requiring the reception of a DHCP datagram well
1214 in excess of all known to be used physical MTU limitations, it is possible
1215 this may have been used in a stack overflow security vulnerability. Thanks
1216 to a patch from infamous42md.
1218 ! Added some sanity checks to OMAPI connection/authentication code.
1219 Although highly improbable, due to having to deliver in excess of 2^32
1220 bytes of data via the OMAPI channel, not to mention requiring dhcpd to
1221 be able to malloc() a memory region 2^32 bytes in size, it was possible
1222 this might have resulted in a heap overflow security vulnerability.
1223 Thanks to a patch from infamous42md.
1225 - dmalloc() memset()'s the non-debug (data) portion of the allocated
1226 memory to zero. Code that memset()'s the result returned by dmalloc() to
1227 zero is redundant. These redundancies were removed.
1229 - Some type declaration corrections to u_int16_t were made in common/tr.c
1230 (Token Ring support) thanks to a patch from Jason Vas Dias at Red Hat.
1232 - A failover bug that was allowing leases that EXPIRED or were RELEASED
1233 where tsfp and tstp are identical timestamps to languish in these
1234 transitional states has been repaired. As a side effect, lease
1235 databases should be kept more consistent overall, not just for these
1236 transitional states.
1238 - If the lease db is deleted out from under the daemon, and it moves to rewrite
1239 the db, it will go ahead with the operation and move the new db into place
1240 once it detects the old db does not exist.
1242 - dhclient now ignores IRDA, SIT, and IEEE1394 network interfaces, as it
1243 is either nonsensical or (in the case of IEEE1394) is not known to support
1244 these interfaces. Thanks to Marius Gedminas and Andrew Pollock of Debian.
1246 - Some previously undocumented reasons for dhclient-script invoking has
1247 been documented in the dhclient-script.8 manpage.
1249 - Failover potential expiry calculations (TSTP) have been corrected. Results
1250 should be substantially more consistent, and proper given the constraints.
1252 - Adjusted lease state validation checks in potential-conflict, to
1253 account for possible clock skew similarly to normal state, and several
1254 previously illegal transitions were made legal (ex: active->released).
1256 - An impossible sanity check was removed from omapi/buffer.c, thanks to a
1257 patch from 'infamous42md'.
1259 - An OMAPI host/network byte order problem in lease time values has been
1262 - Several minor bugs, largely relating to treating 8-byte time values as
1263 4-byte entities, have been repaired after careful review of the FreeBSD
1264 ports collection's patch set. Thanks to the nameless entities who have
1265 contributed to the FreeBSD ports.
1267 - When writing a trace file, the file is now created with permissions 0600,
1268 to help administrators avoid accidentally publicising sensitive config
1271 - The calculation of the maximum size of DHCP packets no longer includes
1272 Ethernet framing overhead. The result is that the 'Maximum Message
1273 Size' option advertised by clients, or the default value 576, is no
1274 longer reduced by 14 bytes, and instead directly reflects the IP level
1275 MTU (and the default, minimum allowed IP MTU of 576).
1277 - The special status of RELEASED/EXPIRED/RESET leases when a server
1278 is operating in partner-down was fixed. It no longer requires a
1279 lease be twice the MCLT beyond STOS to 'reallocate', and the expiry
1280 event to turn these into FREE leases without peer acknowledgement
1281 (after STOS+MCLT) has been repaired.
1283 - Compilation on older Solaris systems (lacking /usr/include/sys/int_types.h)
1286 - "append"ing a string onto the end of a "t" type option (such as the
1287 domain-name field) that had been improperly NULL-terminated by the
1288 DHCP server will no longer result in a truncated string containing
1289 only the option from the server, and not the expected appended value.
1290 Thanks to a patch from Jason Vas Dias at Red Hat.
1292 - File handlers on configuration state (config files and lease dbs) should
1293 be treated consistently, regardless of whether TRACING is defined or not.
1295 - The Linux build environment has had some minor improvements - better
1296 sensing of 64-bit pointer sizes (only used for establishing an icmp_id),
1297 and corrections to #if operators regarding LINUX_MAJOR should it ever
1300 - The server now tries harder to survive the condition where it is unable
1301 to open a new lease file to rewrite the lease state database.
1303 Changes since 3.0.3b3
1305 - dhclient.conf documentation for interface {} was updated to reflect recent
1306 discussion on the dhcp-hackers mailing list.
1308 - In response to reports that the software does not compile on GCC 4.0.0,
1309 -Werror was removed from Makefile.conf for all platforms that used it.
1310 We will address the true problem in a future release; this is a temporary
1313 Changes since 3.0.3b2
1315 - An error in code changes introduced in 3.0.3b2 was corrected, which caused
1316 static BOOTP clients to receive random addresses.
1318 Changes since 3.0.3b1
1320 - A bug was fixed in BOOTPREQUEST handling code wherein stale references to
1321 host records would be left behind on leases that were not allocated to the
1322 client currently booting (eg in the case where the host was denied booting).
1324 - The dhcpd.conf.5 manpage was updated to be more clear in regards to
1325 multiple host declarations (thanks to Vincent McIntyre). 'Interim' style
1326 dynamic updates were also retouched.
1330 - A bug was fixed where a server might load balance a DHCP REQUEST to its
1331 peer after already choosing not to load balance the preceding DISCOVER.
1332 The peer cannot allocate the originating server's lease.
1334 - In the case where a secondary server lost its stable storage while the
1335 primary was still in communications-interrupted, and came back online,
1336 the lease databases would not be fully transferred to the secondary.
1337 This was due to the secondary errantly sending an extra UPDREQ message
1338 when the primary made its state transition to PARTNER-DOWN known.
1340 - The package will now compile cleanly in gcc 3.3 and 3.4. As a side effect,
1341 lease structures will be 9 bytes smaller on all platforms. Thanks to
1342 Jason Vas Dias at Red Hat.
1344 - Interface discovery code in DISCOVER_UNCONFIGURED mode is now
1345 properly restricted to only detecting broadcast interfaces. Thanks
1346 to a patch from Jason Vas Dias at Red Hat.
1348 - decode_udp_ip_header was changed so that the IP address was copied out
1349 to a variable, rather than referenced by a pointer. This enforces 4-byte
1350 alignment of the 32-bit IP address value. Thanks to a patch from Dr.
1353 - An incorrect log message was corrected thanks to a patch from
1356 - A bug in DDNS was repaired, where if the server's first DDNS action was
1357 a DDNS removal rather than a DDNS update, the resolver library's
1358 retransmit timer and retry timer was set to the default, implying a
1359 15 second timeout interval. Which is a little excessive in a synchronous,
1360 single-threaded system. In all cases, ISC DHCP should now hold fast to
1361 a 1-second timeout, trying only once.
1363 - The siaddr field was being improperly set to the server-identifier when
1364 responding to DHCP messages. RFC2131 clarified the siaddr field as
1365 meaning the 'next server in the bootstrap process', eg a tftp server.
1366 The siaddr field is now left zeroed unless next-server is configured.
1368 - mockup_lease() could have returned in an error condition (or in the
1369 condition where no fixed-address was found matching the shared
1370 network) with stale references to a host record. This is probably not
1371 a memory leak since host records generally never die anyway.
1373 - A bug was repaired where failover servers would let stale client identifiers
1374 persist on leases that were reallocated to new clients not sending an id.
1376 - Binding scopes ("set var = value;") are now removed from leases allocated
1377 by failover peers if the lease had expired. This should help reduce the
1378 number of stale binding scopes on leases.
1380 - A small memory leak was closed involving client identifiers larger than
1381 7 bytes, and failover.
1383 - Configuring a subnet in dhcpd.conf with a subnet mask of 32 bits might
1384 cause an internal function to overflow heap. Thanks to Jason Vas Dias
1387 - Some inconsistencies in treating numbers that the lexer parsed as 'NUMBER'
1388 or 'NUMBER_OR_NAME' was repaired. Hexadecimal parsing is affected, and
1391 - In several cases, parse warnings were being issued before the lexical
1392 token had been advanced to the token whose value was causing an error...
1393 causing parse warnings to claim the problem is on the wrong token.
1395 - Host declarations matching on client identifier for dynamic leases will
1396 no longer match fixed-address host declarations (this is now identical
1397 to behaviour for host records matching on hardware address).
1399 Changes since 3.0.2rc3
1401 - A previously undocumented configuration directive, 'local-address',
1402 was documented in the dhcpd.conf manpage.
1404 Changes since 3.0.2rc2
1406 - Two variables introduced in 3.0.2b1 were used without being initialized
1407 in the case where neither the FILE nor SNAME fields were available for
1408 overloading. This was repaired.
1410 - A heretofore believed to be impossible corner case of the option
1411 overloading implementation turned out to be possible ("Unable to sort
1412 overloaded options after 10 tries."). The implementation was reworked
1413 to consider the case of an option so large it would require more than
1414 three chunks to fit.
1416 - Many other instances of variables being used without being initialized
1419 - An uninitialized variable in omapi_io_destroy() led to the discovery
1420 that this function may result in orphaned pointers (and hence, a memory
1423 Changes since 3.0.2rc1
1425 - allocate_lease() was rewritten to repair a bug in which the server would
1426 try to allocate an ABANDONED lease when FREE leases were available.
1428 Changes since 3.0.2b1
1430 - Some dhcp-eval.5 manpage formatting was repaired.
1434 - A bug was fixed in the server's 'option overloading' implementation,
1435 where options loaded into the 'file' and 'sname' packet fields were
1436 not aligned precisely as rfc2131 dictates.
1438 - The FreeBSD client script was changed to support the case where a domain
1439 name was not provided by the server.
1441 - A memory leak in 'omshell' per each command line parsed was
1442 repaired, thanks to a patch from Jarkko Torppa.
1444 - Log functions writing to stderr were adjusted to use the STDERR_FILENO
1445 system definition rather than '2'. This is a no-op for 90% of platforms.
1447 - One call to trace_write_packet_iov() counted the number of io vectors
1448 incorrectly, causing inconsistent tracefiles. This was fixed.
1450 - Some expression parse failure memory leaks were closed.
1452 - A host byte order problem in tracefiles was repaired.
1454 - Pools configured in DHCPD for failover possessing permission lists that
1455 previously were assumed to not include dyanmic bootp clients are now
1456 a little more pessimistic. The result is, dhcpd will nag you about just
1457 about most pools that possess a 'allow' statement with no 'deny' that
1458 would definitely match a dynamic bootp client.
1460 - The 'ddns-update-style' configuration warning bit now insists that
1461 the configuration be globally scoped.
1463 - Two memory leaks in dhclient were closed thanks to a patch from Felix
1466 - Some minor but excellently pedantic documentation errors were fixed
1467 thanks to a patch from Thomas Klausner.
1469 - Bugs in operator precedence in executable statements have been repaired
1470 once again. More legal syntaxes should be parsed legally.
1472 - Failing to initialize a tracefile for any reason if a tracefile was
1473 specified is now a fatal error. Thanks to a patch from Albert Herranz.
1475 - Corrected a bug in which the number of leases transferred as calculated
1476 by the failover primary and sent to peers in POOLRESP responses may be
1477 incorrect. This value is not believed to be used by other failover
1478 implementations, excepting perhaps as logged information.
1480 - Corrected a bug in which 'dhcp_failover_send_poolresp()' was in fact
1481 sending POOLREQ messages instead of POOLRESP mesasges. This message
1482 was essentially ignored since failover secondaries effectively do not
1483 respond to POOLREQ messages.
1485 - Type definitions for various bitwidths of integers in the sunos5-5
1486 build of ISC DHCP have been fixed. It should compile and run more
1487 easily when built in 64-bit for this platform.
1489 - "allow known-clients;" is now a legal syntax, to avoid confusion.
1491 - If one dhcp server chooses to 'load balance' a request to its failover
1492 peer, it first checks to see if it believes said peer has a free
1493 lease to allocate before ignoring the DISCOVER.
1495 - log() was logging a work buffer, rather than the value returned by
1496 executing the statements configured by the user. In some cases,
1497 the work buffer and the intended results were the same. In some other
1498 cases, they were not. This was fixed thanks to a patch from Gunnar
1499 Fjone and directconnect.no.
1501 - Compiler warnings for some string type conversions was fixed, thanks
1502 to Andreas Gustafsson.
1504 - The netbsd build environments were simplified to one, in which
1505 -Wconversion is not used, thanks to Andreas Gustafsson.
1507 - How randomness in the backoff-cutoff dhclient configuration variable
1508 is implemented was better documented in the manpage, and the behaviour
1509 of dhclient in REQUEST timeout handling was changed to match that of
1510 DISCOVER timeout handling.
1512 - Omapi was hardened against clients that pass in null values, thanks
1513 to a patch from Mark Jason Dominus.
1515 - A bug was fixed in dhclient that kept it from doing client-side
1516 ddns updates. Thanks to a patch from Andreas Gustafsson, which
1517 underwent some modification after review by Jason Vas Dias.
1519 - Failover implementations disconnected due to the network between
1520 them (rather than one of the two shutting down) will now try to
1521 re-establish the failover connection every 5 seconds, rather than
1522 to simply try once and give up until one of them is restarted.
1523 Thanks to a patch from Ulf Ekberg from Infoblox, and field testing
1524 by Greger V. Teigre which led to an enhancement to it.
1526 - A problem that kept DHCP Failover secondaries from tearing down
1527 ddns records was repaired. Thanks to a patch from Ulf Ekberg from
1530 - 64bit pointer sizes are detected properly on FreeBSD now.
1532 - A bug was repaired where the DHCP server would leave stale references
1533 to host records on leases it once thought about offering to certain
1534 clients. The result would be to apply host and 'known' scopes to the
1535 wrong clients (possibly denying booting). NOTE: The 'mis-host' patch
1536 that was being circulated as a workaround is not the way this bug was
1537 fixed. If you were a victim of this bug in 3.0.1, you are cautioned
1538 to proceed carefully and see if it fixes your problem.
1540 - A bug was repaired in the server's DHCPINFORM handling, where it
1541 tried to divine the client's address from the source packet and
1542 would get it wrong. Thanks to Anshuman Singh Rawat.
1544 - A log message was introduced to help illuminate the case where the
1545 server was unable to find a lease to assign to any BOOTP client.
1546 Thanks to Daniel Baker.
1548 - A minor dhcpd.conf.5 manpage error was fixed.
1550 Changes since 3.0.1rc14
1552 - The global variable 'cur_time' was centralized and is now uniformly of a
1553 type #defined in system-dependent headers. It had previously been defined
1554 in one of many places as a 32-bit value, and this causes mayhem on 64-bit
1555 big endian systems. It probably wasn't too healthy on little endian
1558 - A printf format string error introduced in rc14 was repaired.
1560 - AIX system-dependent header file was altered to only define NO_SNPRINTF
1561 if the condition used to #ifdef in vsnprintf in AIX' header files
1564 - The Alpha/OSF system-dependent header file was altered to define
1565 NO_SNPRINTF on OS revisions older than 4.0G.
1567 - omapip/test.c had string.h added to its includes.
1569 Changes since 3.0.1rc13
1571 ! CAN-2004-0460 - CERT VU#317350: Five stack overflow exploits were closed
1572 in logging messages with excessively long hostnames provided by the
1573 clients. It is highly probable that these could have been used by
1574 attackers to gain arbitrary root access on systems using ISC DHCP 3.0.1
1575 release candidates 12 or 13. Special thanks to Gregory Duchemin for
1576 both finding and solving the problem.
1578 ! CAN-2004-0461 - CERT VU#654390: Once the above was closed, an opening
1579 in log_*() functions was evidenced, on some specific platforms where
1580 vsnprintf() was not believed to be available and calls were wrapped to
1581 sprintf() instead. Again, credit goes to Gregory Duchemin for finding
1582 the problem. Calls to snprintf() are now linked to a distribution-local
1583 snprintf implementation, only in those cases where the architecture is
1584 not known to provide one (see includes/cf/[arch].h). If you experience
1585 linking problems with snprintf/vsnprintf or 'isc_print_' functions, this
1586 is where to look. This vulnerability did not exist in any previously
1587 published version of ISC DHCP.
1589 - Compilation on hpux 11.11 was repaired.
1591 - 'The cross-compile bug fix' was backed out.
1593 Changes since 3.0.1rc12
1595 - Fixed a bug in omapi lease lookup function, to form the hardware
1596 address for the hash lookup correctly, thanks to a patch from
1599 - Fixed a bug where dhcrelay was sending relayed responses back to the
1600 broadcast address, but with the source's unicast mac address. Should
1601 now conform to rfc2131 section 4.1.
1603 - Cross-compile bug fix; use $(AR) instead of ar. Thanks to Morten Brorup.
1605 - Fixed a crash bug in dhclient where dhcpd servers that do not provide
1606 renewal times results in an FPE. As a side effect, dhclient can now
1607 properly handle 0xFFFFFFFF (-1) expiry times supplied by servers. Thanks
1608 to a patch from Burt Silverman.
1610 - The 'ping timeout' debugs from rc12 were removed to -DDEBUG only,
1611 and reformatted to correct a compilation error on Solaris platforms.
1613 - A patch was applied which fixes a case where leases read from the
1614 leases database do not properly over-ride previously read leases.
1616 - dhcpctl.3 manpage was tweaked.
1618 Changes since 3.0.1rc11
1620 - A patch from Steve Campbell was applied with minor modifications to
1621 permit reverse dns PTR record updates with values containing spaces.
1623 - A patch from Florian Lohoff was applied with some modifications to
1624 dhcrelay. It now discards packets whose hop count exceeds 10 by default,
1625 and a command-line option (-c) can be used to set this threshold.
1627 - A failover bug relating to identifying peers by name length instead of
1630 - Declaring failover configs within shared-network statements should no
1631 longer result in error.
1633 - The -nw command line option to dhclient now works.
1635 - Thanks to a patch from Michael Richardson:
1636 - Some problems with long option processing have been fixed.
1637 - Some fixes to minires so that updates of KEY records will work.
1639 - contrib/ms2isc was updated by Shu-Min Chang of the Intel Corporation.
1640 see contrib/ms2isc/readme.txt for revision notes.
1642 - Dhclient no longer uses shell commands to kill another instance of
1643 itself, it sends the signal directly. Thanks to a patch from Martin
1646 - The FreeBSD dhclient-script was changed so that a failure to write to
1647 /etc/resolv.conf does not prematurely end the script. This keeps dhclient
1648 from looping infinitely when this is the case. Thanks to a patch from
1651 - A patch from Bill Stephens was applied which resolves a problem with lease
1652 expiry times in failover configurations.
1654 - A memory leak in configuration parsing was closed thanks to a patch from
1657 - The function which discovers interfaces will now skip non-broadcast or
1658 point-to-point interfaces, thanks to a patch from David Brownlee.
1660 - Options not yet known by the dhcpd or dhclient have had their names
1661 changed such that they do not contain # symbols, in case they should ever
1662 appear in a lease file. An option that might have been named "#144" is
1665 - Another patch from Bill Stephens which allows the ping-check timeout to
1666 be configured as 'ping-timeout'. Defaults to 1.
1668 Changes since 3.0.1rc10
1670 - Potential buffer overflows in minires repaired.
1672 - A change to the linux client script to use /bin/bash, since /bin/sh may
1675 - Some missing va_end cleanups thanks to a patch from Thomas Klausner.
1677 - A correction of boolean parsing syntax validation - some illegal syntaxes
1678 that worked before are now detected and produce errs, some legal syntaxes
1679 that errored before will now work properly.
1681 - Some search-and-replace errors that caused some options to change their
1684 - Shu-min Chang of the Intel corporation has contributed a perl script and
1685 module that converts the MS NT4 DHCP configuration to a ISC DHCP3
1688 - Applied the remainder of the dhcpctl memory leak patch provided by Bill
1689 Squier at ReefEdge, Inc. (groo@reefedge.com).
1691 - Missing non-optional failover peer configurations will now result in a soft
1692 error rather than a null dereference.
1694 Changes since 3.0.1rc9
1696 - A format string was corrected to fix compiler warnings.
1698 - A number of spelling corrections were made in the man pages.
1700 - The dhclient.conf.5 man page was changed to refer to do-forward-updates
1701 rather than a configuration option that doesn't exist.
1703 - A FreeBSD-specific bug in the interface removal handling was fixed.
1705 - A Linux-specific Token Ring detection problem was fixed.
1707 - Hashes removed from as-yet-unknown agent options, having those options
1708 appear in reality before we know about them will no longer produce
1709 self-corrupting lease databases.
1711 - dhclient will use the proper port numbers now when using the -g option.
1713 - A order-of-operations bug with 2 match clauses in 1 class statement is
1714 fixed thanks to a patch from Andrew Matheson.
1716 - Compilation problems on Solaris were fixed.
1718 - Compilation problems when built with DEBUG or DEBUG_PACKET were repaired.
1720 - A fix to the dhcp ack process which makes certain group options will be
1721 included in the first DHCPOFFER message was made thanks to a patch from
1724 - A few memory leaks were repaired thanks to patches from Bill Squier at
1725 ReefEdge, Inc. (groo@reefedge.com).
1727 - A fix for shared-networks that sometimes give clients options for the
1728 wrong subnets (in particular, 'option routers') was applied, thanks to
1729 Ted Lemon for the patch.
1731 - Omshell's handling of dotted octets as values was changed such that dots
1732 one after the other produce zero values in the integer string.
1734 Changes since 3.0.1rc8
1736 - Fix a format string vulnerability in the server that could lead to a
1737 remote root compromise (discovered by NGSEC Research Team, www.ngsec.com).
1739 - Add additional support for NetBSD/sparc64.
1741 - Fix a bug in the command-line parsing of the client. Also, resolve
1744 - Add better support for shells other than bash in the Linux client
1747 - Various build fixes for modern versions of FreeBSD and Linux.
1749 - Fix a bad bounds check when printing binding state names.
1751 - Clarify documentation about fixed-address and multiple addresses.
1753 - Fix a typo in the authoritative error message.
1755 - Make a log entry when we can't write a billing class.
1757 - Use conversion targets that are the right size on all architectures.
1759 - Increment the hop count when relaying.
1761 - Log a message when lease state is changed through OMAPI.
1763 - Don't rerun the shared_network when evaluating the pool.
1765 - Fix a reversed test in the parser.
1767 - Change the type of rbuf_max.
1769 - Make FTS_LAST a manifest constant to quiet warnings.
1771 Changes since 3.0.1rc7
1773 - Fix two compiler warnings that are generated when compiling on Solaris
1774 with gcc. These stop the build, even though they weren't actually
1775 errors, because we prefer that our builds generate no warnings.
1777 Changes since 3.0.1rc6
1779 - Don't allow a lease that's in the EXPIRED, RELEASED or RESET state
1782 - Implement lease stealing for cases where the primary has fewer leases
1783 than the secondary, as called for by the standard.
1785 - Add a fudge factor to the lease expiry acceptance code, (suggested
1786 by Kevin Miller of CMU).
1788 - Fix a bug in permit_list_match that made it much too willing to say
1789 that two permit lists matched.
1791 - Unless DEBUG_DNS_UPDATES is defined, print more user-friendly (and
1792 also more compact) messages about DNS updates.
1794 - Fix a bug in generating wire-format domain names for the FQDN option.
1796 - Fix a bug where the FQDN option would not be returned if the client
1797 requested it, contrary to the standard.
1799 - On Darwin, use the FreeBSD DHCP client script.
1801 - On NetBSD/sparc, don't check for casting warnings.
1803 - Add a flag in the DHCP client to disable updating the client's A
1804 record when sending an FQDN option indicating that the client is
1805 going to update its A record.
1807 - In the client, don't attempt a DNS update until one second after
1808 configuring the new IP address, and if the update times out, keep
1809 trying until a response, positive or negative, is received from the
1812 - Fix an uninitialized memory bug in the DHCP client.
1814 - Apply some FreeBSD-specific bug fixes suggested by Murray Stokely.
1816 - Fix a bug in ns_parserr(), where it was returning the wrong sort
1817 of result code in some cases (suggested by Ben Harris of the
1820 - Fix a bug in is_identifier(), where it was checking against EOF
1821 instead of the END_OF_FILE token (also suggested by Ben Harris).
1823 - Fix a bug where if an option universe contained no options, the
1824 DHCP server could dump core (Walter Steiner).
1826 - Fix a bug in the handling of encapsulated options.
1828 - Fix a bug that prevented NWIP suboptions from being processed.
1830 - Delete the FTS_BOOTP and FTS_RESERVED states and implement them
1831 as modifier flags to the FTS_ACTIVE state, as called for in the
1832 failover protocol standard.
1834 - Fix bugs in the pool merging code that resulted in references and
1835 dereferences of null pointers. This bug had no impact unless the
1836 POINTER_DEBUG flag was defined.
1838 - In the server, added a do-forward-updates flag that can be used to
1839 disable forward updates in all cases, so that sites that want the
1840 clients to take sole responsibility for updating their A record can
1843 - Make it possible to disable optimization of PTR record updates.
1845 Changes since 3.0.1rc5
1847 - Include some new documentation and changes provided by Karl Auer.
1849 - Add a workaround for some Lexmark printers that send a double-NUL-
1850 terminated host-name option, which would break DNS updates.
1852 - Fix an off-by-one error in the MAC-address checking code for
1853 DHCPRELEASE that was added in 3.0.1rc5.
1855 - Fix a bug where client-specific information was not being discarded
1856 from the lease when it expired or was released, resulting in
1857 problems if the lease was reallocated to a different client.
1859 - If more than one allocation pool is specified that has the same set
1860 of constraints as another allocation pool on the same shared
1861 network, merge the two pools.
1863 - Don't print an error in fallback_discard, since this just causes
1864 confusion and does not appear to be helping to encourage anyone to
1867 Changes since 3.0.1rc4
1869 - Fix a bug that would cause the DHCP server to spin if asked to parse
1870 a certain kind of incorrect statement.
1872 - Fix a related bug that would prevent an error from being reported in
1875 - Additional documentation.
1877 - Make sure that the hardware address matches the lease when
1878 processing a DHCPRELEASE message.
1880 Changes since 3.0.1rc3
1882 - A minor bug fix in the arguments to a logging function call.
1883 - Documentation update for dhcpd.conf.
1885 Changes since 3.0.1rc2
1887 - Allow the primary to send a POOLREQ message. This isn't what the current
1888 failover draft says to do, so we may have to back it out if I can't get the
1889 authors to relent, but the scheme for balancing that's specified in the
1890 current draft seems needlessly hairy, so I'm floating a trial balloon.
1891 The rc1 code did not implement the method described in the draft either.
1893 Changes since 3.0.1rc1
1895 - Treat NXDOMAIN and NXRRSET as success when we are trying to delete a
1896 domain or RRSET. This allows the DHCP server to forget about a name
1897 it added to the DNS once it's been removed, even if the DHCP server
1898 wasn't the one that removed it.
1900 - Install defaults for failover maximum outstanding updates and maximum
1901 silent time. This prevents problems that might occur if these values
1902 were not configured.
1904 - Don't do DDNS deletes if ddns-update-style is none.
1906 - Return relay agent information options in DHCPNAK. This prevents DHCPNAK
1907 messages from being dropped when the relay agent information option contains
1908 routing information.
1910 - Fix a problem where coming up in recover wouldn't result in an update
1913 - Add some more chatty messages when we start a recovery update and when it's
1916 - Fix a possible problem where some state might have been left around
1917 after the peer lost contact and regained contact about how many updates
1920 - Don't nix a lease update because of a lease conflict. This test has
1921 never (as far as I know) prevented a mistake, and it appears to cause
1922 problems with failover.
1924 - Add support in rc history code for keeping a selective history, rather
1925 than a history of all references and dereferences. This code is only used
1926 when extensive additional debugging is enabled.
1930 - Make allocators for hash tables. As a side effect, this fixes a memory
1931 smash in the subclass allocation code.
1933 - Fix a small bug in omshell where if you try to close an object when
1934 no object is open, it dumps core.
1936 - Fix an obscure coredump that could occur on shutdown.
1938 - Fix a bug in the recording of host declaration rubouts in the lease file.
1940 - Fix two potential spins in the host deletion code.
1942 - Fix a core dump that would happen if an application tried to update
1943 a host object attribute with a null value.
1945 Changes since 3.0 Release Candidate 12
1947 - Fix a memory leak in the evaluation code.
1949 - Fix an obscure core dump.
1951 - Print a couple of new warnings when parsing the configuration file
1952 when crucial information is left out.
1954 - Log "no free leases" as an error.
1956 - Documentation updates.
1958 Changes since 3.0 Release Candidate 11
1960 - Always return a subnet selection option if one is sent.
1962 - Fix a warning that was being printed because an automatic data
1963 structure wasn't zeroed.
1965 - Fix some failover state transitions that were being handled
1968 - When supersede_lease is called on a lease whose end time has already
1969 expired, but for which a state transition has not yet been done, do
1970 a state transition. This fixes the case where if the secondary
1971 allocated a lease to a client and the lease "expired" while the
1972 secondary was in partner-down, no expiry event would actually
1973 happen, so the lease would remain active until the primary was
1976 Changes since 3.0 Release Candidate 10
1978 - Fix a bug that was preventing released leases from changing state
1979 in failover-enabled pools.
1981 - Fix a core dump in the client identifier finder code (for host
1984 - Finish fixing a bug where bogus data would sometimes get logged to
1985 the dhclient.leases file because it was opened as descriptor 2.
1987 - Fix the Linux dhclient-script according to suggestions made by
1988 several people on the dhcp-client mailing list.
1990 - Log successful DNS updates at LOG_INFO, not LOG_ERROR.
1992 - Print an error message and refuse to run if a failover peer is
1993 defined but not referenced by any pools.
1995 - Correct a confusing error message in failover.
1997 Changes since 3.0 Release Candidate 9
1999 - Fix a bug in lease allocation for Dynamic BOOTP clients.
2001 Changes since 3.0 Release Candidate 8 Patchlevel 2
2003 - Fix a bug that prevented update-static-leases from working.
2005 - Document failover-state OMAPI object.
2007 - Fix a compilation error on SunOS 4.
2009 Changes since 3.0 Release Candidate 8 Patchlevel 1
2011 - Fix a parsing bug that broke dns updates (both interim and ad-hoc).
2012 This was introduced in rc8pl1 as an unintended result of the memory
2013 leakage fixes that were in pl1.
2015 - Fix a long-standing bug where the server would record that an update
2016 had been done for a client with no name, even though no update had
2017 been done, and then when the client's lease expired the deletion of
2018 that nonexistant record would time out because the name was the null
2021 - Clean up the omshell, dhcpctl and omapi man pages a bit.
2023 Changes since 3.0 Release Candidate 8
2025 - Fix a bug that could cause the DHCP server to spin if
2026 one-lease-per-client was enabled.
2028 - Fix a bug that was causing core dumps on BSD/os in the presence of
2031 - In partner-down state, don't restrict lease lengths to MCLT.
2033 - On the failover secondary, record the MCLT received from the primary
2034 so that if we come up without a connection to the primary we don't
2035 wind up giving out zero-length leases.
2037 - Fix some compilation problems on BSD/os.
2039 - Fix a bunch of memory leaks.
2041 - Fix a couple of bugs in the option printer.
2043 - Fix an obscure error reporting bug in the dns update code, and also
2044 make the message clearer when a key algorithm isn't supported.
2046 - Fix a bug in the tracing code that prevented trace runs that used
2047 tcp connections from being played back.
2049 - Add some additional debugging capability for catching memory leaks
2052 - Make the client release the lease correctly on shutdown.
2054 - Add some configurability to the build system.
2056 - Install omshell manual page in man1, not man8.
2058 - Craig Gwydir sent in a patch that fixes a long-standing bug in the
2059 DHCP client that could cause core dumps, but that for some reason
2060 hadn't been noticed until now.
2062 Changes since 3.0 Release Candidate 7
2064 - Fix a bug in failover where we weren't sending updates after a
2065 transition from communications-interrupted to normal.
2067 - Handle expired/released/reset -> free transition according to the
2068 protocol specification (this works - the other way not only wasn't
2069 conformant, but also didn't work).
2071 - Add a control object in both client and server that allows either
2072 daemon to be shut down cleanly.
2074 - When writing a lease, if we run out of disk space, shut down the
2075 output file and insist on writing a new one before proceeding.
2077 - In the server, if the OMAPI listener port is occupied, keep trying
2078 to get it, rather than simply giving up and exiting.
2080 - Support fetching variables from leases and also updating and adding
2081 variables to leases via OMAPI.
2083 - If two failover peers have wildly different clocks, refuse to start
2086 - Fix a bug in the DNS update code that could cause core dumps when
2087 running on alpha processors.
2089 - Fixed a bug in ddns updates for static lease entries, thanks to a
2090 patch from Andrey M Linkevitch.
2092 - Add support for Darwin/MacOS X
2094 - Install omshell (including new documentation).
2096 - Support DNS updates in the client (this is a very obscure feature
2097 that most DHCP client users probably will not be able to use).
2099 - Somewhat cleaner status logging in the client.
2101 - Make OMAPI key naming syntax compatible with the way keys are
2102 actually named (key names are domain names).
2104 - Fix a bug in the lease file writer.
2106 - Install DHCP ISC headers in a different place than BIND 9 ISC
2107 headers, to avoid causing trouble in BIND 9 builds.
2109 - Don't send updates for attributes on an object when the attributes
2110 haven't changed. Support deleting attributes on remote objects.
2112 - Fix a number of bugs in omshell, and add the unset and refresh
2115 - Handle disconnects in OMAPI a little bit more intelligently (so that
2116 the caller gets ECONNRESET instead of EINVAL).
2118 - Fix a bunch of bugs in the handling of clients that have existing
2119 leases when the try to renew their leases while failover is
2122 Changes since 3.0 Release Candidate 6
2124 - Fix a core dump that could happen when processing a DHCPREQUEST from
2125 a client that had a host declaration that contained both a
2126 fixed-address declaration and a dhcp-client-identifier option
2127 declaration, if the client identifier was longer than nine bytes.
2129 - Fix a memory leak that could happen in certain obscure cases when
2130 using omapi to manipulate leases.
2132 - Fix some bugs and omissions in omshell.
2135 Changes since 3.0 Release Candidate 5
2137 - Fix a bug in omapi_object_dereference that prevented objects in
2138 chains from having their reference counts decreased on dereference.
2140 - Fix a bug in omapi_object_dereference that would prevent object
2141 chains from being freed upon removal of the last reference external
2144 - Fix a number of other memory leaks in the OMAPI protocol subsystem.
2146 - Add code in the OMAPI protocol handler to trace memory leakage.
2148 - Clean up the memory allocation/reference history printer.
2150 - Support input of dotted quads and colon-separated hex lists as
2151 attribute values in omshell.
2153 - Fix a typo in the Linux interface discovery code.
2155 - Conditionalize a piece of trace code that wasn't conditional.
2157 Changes since 3.0 Release Candidate 4
2159 - Fix a bug that would prevent leases from being abandoned properly on
2162 - Fix failover peer OMAPI support.
2164 - In failover, correctly handle expiration of leases. Previously,
2165 leases would never be reclaimed because they couldn't make the
2166 transition from EXPIRED to FREE.
2168 - Fix some broken failover state transitions.
2170 - Documentation fixes.
2172 - Take out an unnecessary check in DHCP relay agent information option
2173 stashing code that was preventing REBINDING clients from rebinding.
2175 - Prevent failover peers from allocating leases in DHCPREQUEST
2176 processing if the lease belongs to the other server.
2178 - Record server version in lease file introductory comment.
2180 - Correctly report connection errors in OMAPI and failover.
2182 - Make authentication signature algorithm name comparisons in OMAPI
2185 - Fix compile problem on SunOS 4.x
2187 - If a signature algorithm is not terminated with '.', terminate it so
2188 that comparisons between fully-qualified names will work
2191 - Different SIOCGIFCONF probe code, may "fix" problem on some Linux
2192 systems with the probe not working correctly.
2194 - Don't allow user to type omapi key on command line of omshell.
2196 Changes since 3.0 Release Candidate 3
2198 - Do lease billing on startup in a way that I *think* will finally do
2199 the billing correctly - the previous method could overbill as a
2200 result of duplicate leases.
2202 - Document OMAPI server objects.
2204 Changes since 3.0 Release Candidate 2 Patchlevel 1
2206 - Fix some problems in the DDNS update code. Thanks to Albert
2207 Herranz for figuring out the main problem.
2209 - Fix some reference counting errors on host entries that were causing
2212 - Fix a byte-swap bug in the token ring code, thanks to Jochen
2215 - Fix a bug in lease billing, thanks to Jonas Bulow.
2217 Changes since 3.0 Release Candidate 2
2219 - Change the conditions under which a DHCPRELEASE is actually
2220 committed to be consistent with lease binding states rather than
2221 using the lease end time. This may fix some problems with the
2224 - Fix a bug where lease updates would fail on Digital Unix (and maybe
2225 others) because malloc was called with a size of zero.
2227 - Fix a core dump that happens when the DHCP server can't create its
2230 Changes since 3.0 Release Candidate 1 Patchlevel 1
2232 - Fix the dhcp_failover_put_message to not attempt to allocate a
2233 zero-length buffer. Some versions of malloc() fail if you try to
2234 allocate a zero-length buffer, and this was causing problems on,
2237 - Fix a case where the failover code was printing an error message
2238 when no error had occurred.
2240 - Fix a problem where when a server went down and back up again, the
2241 peer would not see a state transition and so would stay in the
2242 non-communicating state.
2244 - Be smart about going into recover_wait.
2246 - Fix a problem in the failover implementation where peers would fail
2247 to come into sync if interrupted in the RECOVER state. This could
2248 have been the cause of some problems people have reported recently.
2250 - Fix a problem with billing classes where they would not be unbilled
2251 when the client lease expired.
2253 - If select fails, figure out which descriptor is bad, and cut it out
2254 of the I/O loop. This prevents a potentially nasty spin. I
2255 haven't heard any report it in a while, but it came up consistently
2258 - Fix a bug in the relay agent where if you specified interfaces on
2259 the command line, it would fail.
2261 - Fix a couple of small bugs in the omapi connection object (no known
2264 - Add the missing 3.0 Beta 1 lease conversion script.
2266 - Read dhcp client script hooks if they exist, rather than only if
2269 Changes since 3.0 Release Candidate 1
2271 - Fix a memory smash that happens when fixed-address leases are used.
2272 ANY SITE AT WHICH FIXED-ADDRESS STATEMENTS ARE BEING USED SHOULD
2273 UPGRADE IMMEDIATELY. This has been a long-standing bug - thanks to
2274 Alvise Nobile for discovering it and helping me to find it!
2276 - Fix a small bug in binary-to-ascii, thanks to H. Peter Anvin of
2279 - There is a known problem with the DHCP server doing failover on
2280 Compaq Alpha systems. This patchlevel is not a release candidate
2281 because of this bug. The bug should be straightforward to fix, so
2282 a new release candidate is expected shortly.
2284 - There is a known problem in the DDNS update code that is probably a
2285 bug, and is not, as far as we know, fixed in this patchlevel.
2287 Changes since 3.0 Beta 2 Patchlevel 24
2289 - Went over problematic failover state transitions and made them all
2290 work, so that failover should now much less fragile.
2292 - Add some dhcpctl and omapi documentation
2294 - Fix compile errors when compiling with unusual predefines.
2296 - Make Token Ring work on Linux 2.4
2298 - Fix the Digital Unix BPF_WORDALIGN bug.
2300 - Fix some dhcp client documentation errors.
2302 - Update some parts of the README file.
2304 - Support GCC on SCO.
2306 Changes since 3.0 Beta 2 Patchlevel 23
2308 - Fix a bug in the DNS update code where a status code was not being
2309 checked. This may have been causing core dumps.
2311 - When parsing the lease file, if a lease declaration includes a
2312 billing class statement, and the lease already has a billing class,
2313 unbill the old class.
2315 - When processing failover transactions, where acks will be deferred,
2316 process the state transition immediately.
2318 - Don't try to use the new SIOCGIFCONF buffer size detection code on
2319 Linux 2.0, which doesn't provide this functionality.
2321 - Apply a patch suggested by Tuan Uong for a problem in dlpi.c.
2323 - Fix a problem in using the which command in the configure script.
2325 - Fix a parse error in the client when setting up an omapi listener.
2327 - Document the -n and -g flags to the client.
2329 - Make sure there is always a stdin and stdout on startup. This
2330 prevents shell scripts from accidentally writing error messages into
2331 configuration files that happen to be opened as stderr.
2333 - If an interface is removed, the client will now notice that it is
2334 gone rather than spinning. This has only been tested on NetBSD.
2336 - The client will attempt to get an address even if it can't create a
2339 - Don't overwrite tracefiles.
2341 - Fix some memory allocation bugs in failover.
2343 Changes since 3.0 Beta 2 Patchlevel 22
2345 - Apply some patches suggested by Cyrille Lefevre, who is maintaining
2346 the FreeBSD ISC DHCP Distribution port.
2348 - Fix a core dump in DHCPRELEASE.
2350 Changes since 3.0 Beta 2 Patchlevel 21
2352 - This time for sure: fix the spin described in the changes for pl20.
2354 Changes since 3.0 Beta 2 Patchlevel 20
2356 - Fix a problem with Linux detecting large numbers of interfaces (Ben)
2358 - Fix a memory smash in the quotify code, which was introduced in
2361 - Actually fix the spin described in the changes for pl20. The
2362 previous fix only partially fixed the problem - enough to get it
2363 past the regression test.
2365 Changes since 3.0 Beta 2 Patchlevel 19
2367 - Fix a bug that could cause the server to abort if compiled with
2368 POINTER_DEBUG enabled.
2370 - Fix a bug that could cause the server to spin when responding to a
2373 - Apply Joost Mulders' suggested patches for DLPI on x86.
2375 - Support NUL characters in quoted strings.
2377 - Install unformatted man pages on SunOS.
2379 Changes since 3.0 Beta 2 Patchlevel 18
2381 - Allow the server to be placed in partner-down state using OMAPI.
2384 - Implement omshell, which can be used to do arbitrary things to the
2385 server (in theory). (Damien Neil)
2387 - Fix a case where if a client had two different leases the server could
2388 actually dereference the second one when it hadn't been referenced,
2389 leading to memory corruption and a core dump. (James Brister)
2391 - Fix a case where a client could request the address of another client's
2392 lease, but find_lease wouldn't detect that the other client had it, and
2393 would attempt to allocate it to the client, resulting in a lease conflict
2396 - Fix a case where a client with more than one client identifier could be
2397 given a lease where the hardware address was correct but the client
2398 identifier was not, resulting in a lease conflict message.
2400 - Fix a problem where the server could write out a colon-separated
2401 hex list as a value for a variable, which would then not parse.
2402 The fix is to always write strings as quoted strings, with any
2403 non-printable characters quoted as octal escape sequences. So
2404 a file written the old way still won't work, but new files written
2407 - Fix documentation for sending non-standard options.
2409 - Use unparsable names for unknown options. WARNING: this will
2410 break any configuration files that use the option-nnn convention.
2411 If you want to continue to use this convention for some options,
2412 please be sure to write a definition, like this:
2414 option option-nnn code nnn = string;
2416 You can use a descriptive name instead of option-nnn if you like.
2418 - Fix a problem where we would see a DHCPDISCOVER/DHCPOFFER/
2419 DHCPREQUEST/DHCPACK/DHCPREQUEST/DHCPNAK sequence. This was the
2420 result of a deceptively silly bug in supersede_lease.
2422 - Fix client script exit status check, according to a fix supplied by
2425 - Fix an endianness bug in the tracefile support, regarding ICMP
2428 - Fix a bug in the client where the medium would not work correctly if
2429 it contained quoted strings.
2431 ** there was no pl17 **
2433 Changes since 3.0 Beta 2 Patchlevel 16
2435 - Add support for transaction tracing. This allows the state of the
2436 DHCP server on startup, and all the subsequent transactions, to be
2437 recorded in a file which can then be played back to reproduce the
2438 behaviour of the DHCP server. This can be used to quickly
2439 reproduce bugs that cause core dumps or corruption, and also for
2440 tracking down memory leaks.
2442 - Incorporate some bug fixes provided by Joost Mulders for the DLPI
2443 package which should clear up problems people have been seeing on
2446 - Fix bugs in the handling of options stored as linked lists (agent
2447 options, fqdn options and nwip options) that could cause memory
2448 corruption and core dumps.
2450 - Fix a bug in DHCPREQUEST handling that resulted in DHCPNAK messages
2451 not being send in some cases when they were needed.
2453 - Make the lease structure somewhat more compact.
2455 - Make initial failover startup *much* faster. This was researched
2456 and implemented by Damien Neil.
2458 - Add a --version flag to all executables, which prints the program
2459 name and version to standard output.
2461 - Don't rewrite the lease file every thousand leases.
2463 - A bug in nit.c for older SunOS machines was fixed by a patch sent in
2464 by Takeshi Hagiwara.
2466 - Fix a memory corruption bug in the DHCP client.
2468 - Lots of documentation updates.
2470 - Add a feature allowing environment variables to be passed to the
2471 DHCP client script on the DHCP client command line.
2473 - Fix client medium support, which had been broken for some time.
2475 - Fix a bug in the DHCP client initial startup backoff interval, which
2476 would cause two DHCPDISCOVERS to be sent back-to-back on startup.
2479 Changes since 3.0 Beta 2 Patchlevel 15
2481 - Some documentation tweaks.
2483 - Maybe fix a problem in the DLPI code.
2485 - Fix some error code space inconsistencies in ddns update code.
2487 - Support relay agents that intercept unicast DHCP messages to stuff
2488 agent options into them.
2490 - Fix a small memory leak in the relay agent option support code.
2492 - Fix a core dump that would occur if a packet was sent with no
2495 Changes since 3.0 Beta 2 Patchlevel 14
2497 - Finish fixing a long-standing bug in the agent options code. This
2498 was causing core dumps and failing to operate correctly - in
2499 particular, agent option stashing wasn't working. Agent option
2500 stashing should now be working, meaning that agent options can be
2501 used in class statements to control address allocation.
2503 - Fix up documentation.
2505 - Fix a couple of small memory leaks that would have added up
2506 significantly in a high-demand situation.
2508 - Add a log-facility configuration parameter.
2510 - Fix a compile error on some older operating systems.
2512 - Add the ability in the client to execute certain statements before
2513 transmitting packets to the server. Handy for debugging; not much
2514 practical use otherwise.
2516 - Don't send faked-out giaddr when renewing or bound - again, useful
2519 Changes since 3.0 Beta 2 Patchlevel 13
2521 - Fixed a problem where the fqdn decoder would sometimes try to store
2522 an option with an (unsigned) negative length, resulting in a core
2523 dump on some systems.
2525 - Work around the Win98 DHCP client, which NUL-terminates the FQDN
2528 - Work around Win98 and Win2k clients that will claim they want to do
2529 the update even when they don't have any way to do it.
2531 - Fix some log messages that can be printed when failover is operating
2532 that were not printing enough information.
2534 - It was possible for a DHCPDISCOVER to get an allocation even when
2535 the state machine said the server shouldn't be responding.
2537 - Don't load balance DHCPREQUESTs from clients in RENEWING and
2538 REBINDING, since in RENEWING, if we heard it, it's for us, and in
2539 REBINDING, the client wouldn't have got to REBINDING if its primary
2542 - When we get a bogus state lease binding state transition, don't do
2546 Changes since 3.0 Beta 2 Patchlevel 12
2548 - Fixed a couple of silly compile errors.
2550 Changes since 3.0 Beta 2 Patchlevel 11
2552 - Albert Herranz tracked down and fixed a subtle bug in the base64
2553 decoder that would prevent any key with an 'x' in its base64
2554 representation from working correctly.
2556 - Thanks to Chris Cheney and Michael Sanders, we have a fix for the
2557 hang that they both spotted in the DHCP server - when
2558 one-lease-per-client was set, the code to release the "other" lease
2561 - Fix a problem with alignment of the input buffer in bpf in cases
2562 where two packets arrive in the same bpf read.
2564 - Fix a problem where the relay agent would crash if you specified an
2565 interface name on the command line.
2567 - Add the ability to conditionalize client behaviour based on the
2570 - Add support for the FQDN option, and added support for a new way of
2571 doing ddns updates (ddns update style interim) that allows more than
2572 one DHCP server to update the DNS for the same network(s). This
2573 was implemented by Damien Neil with some additional functionality
2576 - Damien added a "log" statement, so that the configuration file can
2577 be made to log debugging information and other information.
2579 - Fixed a bug that caused option buffers not to be terminated with an
2582 - Fixed a long-standing bug in the support for option spaces where the
2583 options are stored as an ordered list rather than in a hash table,
2584 which could theoretically result in memory pool corruption.
2586 - Prevent hardware declarations with no actual hardware address from
2587 being written as something unparsable, and behave correctly in the
2588 face of a null hardware address on input.
2590 - Allow key names to be FQDNs, and qualify the algorithm name if it is
2591 specified unqualified.
2593 - Modify the DDNS update code so that it never prints the "resolver
2594 failed" message, but instead says *why* the resolver failed.
2596 - Officially support the subnet selection option, which now has an
2599 - Fix a build bug on MacOS X.
2601 - Allow administrator to disable ping checking.
2603 - Clean up dhcpd.conf documentation and add more information about how
2606 Changes since 3.0 Beta 2 Patchlevel 10
2608 - Fix a bug introduced during debugging (!) and accidentally committed
2611 Changes since 3.0 Beta 2 Patchlevel 9
2613 - Fix DHCP client handling of vendor encapsulated options.
2615 - Fix a bug in the handling of relay agent information options introduced
2618 - Stash agent options on client leases by default, and use the stashed
2619 options at renewal time.
2621 - Add the ability to test the client's binding state in the client
2622 configuration language.
2624 - Fix a core dump in the DNS update code.
2626 - Fix some expression evaluation bugs that were causing updates to be
2627 done when no client hostname was received.
2629 - Fix expression evaluation debugging printfs.
2631 - Teach pretty_print_option to print options in option spaces other than
2632 the DHCP option space.
2634 - Add a warning message if the RHS of a not is not boolean.
2636 - Never select for more than a day, because some implementations of
2637 select will just fail if the timeout is too long (!).
2639 - Fix a case where a DHCPDISCOVER from an unknown network would be
2642 - Fix a bug where if a client requested an IP address for which a different
2643 client had the lease, the DHCP server would reallocate it anyway.
2645 - Fix the DNS update code so that if the client changes its name, the DNS
2646 will be correctly updated.
2648 Changes since 3.0 Beta 2 Patchlevel 8
2650 - Oops, there was another subtle math error in the header-length
2653 Changes since 3.0 Beta 2 Patchlevel 7
2655 - Oops, forgot to byte-swap udp header length before bounds-checking it.
2657 Changes since 3.0 Beta 2 Patchlevel 6
2659 - Fix a possible DoS attack where a client could cause the checksummer
2660 to dump core. This was a read, not a write, so it shouldn't be
2661 possible to exploit it any further than that.
2663 - Implement client- and server-side support for using the Client FQDN
2666 - Support for other option spaces in the client has been added. This
2667 means that it is now possible to define a vendor option space on the
2668 client, request options in that space from the server (which must
2669 define the same option space), and then use those options in the
2670 client. This also allows NWIP and Client FQDN options to be used
2673 - Add object initializer support. This means that objects can now be
2674 initialized to something other than all-zeros when allocated, which
2675 makes, e.g., the interface object support code a little more robust.
2677 - Fix an off-by-one bug in the host stuffer. This was causing host
2678 deletes not the work, and may also have been causing OMAPI
2679 connections to get dropped. Thanks to James Brister for tracking
2682 - Fixed a core dump in the interface discovery code that is triggered
2683 when there is no subnet declaration for an interface, but the server
2684 decides to continue running. Thanks to Shane Kerr for tracking
2685 down and fixing this problem.
2687 Changes since 3.0 Beta 2 Patchlevel 5
2689 - Fix a bug in the recent enhancement to the interface discovery code
2690 to support arbitrary-length interface lists.
2692 - Support NUL-terminated DHCP options when initializing client-script
2695 - Fix suffix operator.
2697 - Fix NetWare/IP option parsing.
2699 - Better error/status checking in dhcpctl initialization and omapi
2702 - Fix a potential memory smash in dhcpctl code.
2704 - Fix SunOS4 and (maybe) Ultrix builds.
2706 - Fix a bug where a certain sort of incoming packet could cause a core
2707 dump on Solaris (and probably elsewhere).
2709 - Add some more safety checks in error logging code.
2711 - Add support for ISC_R_INCOMPLETE in OMAPI protocol connection code.
2713 - Fix relay agent so that if an interface is specified on the command
2714 line, the relay agent does not dump core.
2716 - Fix class matching so that match if can be combined with match or
2719 - Do not allow spurious leases in the lease database to introduce
2720 potentially bogus leases into the in-memory database.
2722 - Fix a byte-order problem in the client hardware address type code
2725 - Be slightly less picky about what sort of hardware addresses OMAPI
2726 can install in host declarations.
2728 Changes since 3.0 Beta 2 Patchlevel 4
2730 - Incorporated Peter Marschall's proposed change to array/record
2731 parsing, which allows things like the slp-agent option to be encoded
2732 correctly. Thanks very much to Peter for taking the initiative to
2733 do this, and for doing such a careful job of it (e.g., updating the
2736 - Added an encoding for the slp-agent option. :')
2738 - Fixed SunOS 4 build. Thanks to Robert Elz for responding to my
2739 request for help on this with patches!
2741 - Incorporated a change that should fix a problem reported by Philippe
2742 Jumelle where when the network connection between two servers is
2743 lost, they never reconnect.
2745 - Fix client script files other than that for NetBSD to actually use
2746 make_resolv_conf as documented in the manual page.
2748 - Fix a bug in the packet handling code that could result in a core
2751 - Fix a bug in the bootp code where responses on the local net would
2752 be sent to the wrong MAC address. Thanks to Jerry Schave for
2755 Changes since 3.0 Beta 2 Patchlevel 3
2757 - In the DHCP client, execute client statements prior to using the values
2758 of options, so that the client configuration can overridden, e.g., the
2761 - Fix a reference counting error that would result in very reproducible
2762 failures in updates, as well as occasional core dumps, if a zone was
2763 declared without a key.
2765 - Fix some Linux 2.0 compilation problems.
2767 - Fix a bug in scope evaluation during execution of "on" statements that
2768 caused values not to be recorded on leases.
2770 - If the dhcp-max-message-size option is specified in scope, and the
2771 client didn't send this option, use the one specified in scope to
2772 determine the maximum size of the response.
2774 Changes since 3.0 Beta 2 Patchlevel 2
2776 - Fix a case where spawning subclasses were being allocated
2777 incorrectly, resulting in a core dump.
2779 - Fix a case where the DHCP server might inappropriately NAK a
2782 - Fix a place dhcprequest() where static leases could leak.
2784 - Include memory.h in omapip_p.h so that we don't get warnings about
2787 Changes since 3.0 Beta 2 Patchlevel 1
2789 - Notice when SIOCFIGCONF returns more data than fit in the buffer -
2790 allocate a larger buffer, and retry. Thanks to Greg Fausak for
2793 - In the server, if no interfaces were configured, report an error and
2796 - Don't ever record a state of 'startup'.
2798 - Don't try to evaluate the local failover binding address if none was
2799 specified. Thanks to Joseph Breu for finding this.